A. 331 m/second
B. 320 m/second
C. 332 m/second
D. 3,320 m/second

A. Volt
B. Erg
C. Ohm
D. Joule

A. Ohm
B. Watt
C. Ampere
D. None of the above

A. Distant objects
B. Near objects
C. Small objects
D. Living cells

A. Louis Braille
B. Louis Pasture
C. Albert Einstein
D. Movie Curie

A. Newton
B. Dalton
C. Copernicus
D. Einstein

A. Visible light
B. Infrared radiation
C. X-rays and gamma rays
D. Ultraviolet radiation

A. 60-80 db
B. 45-60 db
C. 100-120 db
D. 25-45 db

A. 21.5
B. 23.5
C. 66.5
D. 90

A. air
B. steel
C. vacuum
D. water